Method of making a slider for a slide fastener



L. M. DORMAN 2,764,807

METHOD OF MAKING A SLIDER FOR A SLIDE FASTENER Oct. 2, 1956 Filed March 7, 1951 all 1N VEN TOR.

United States Patent 2,764,807 METHOD OFMAQKING AQSLIDERFURA SLIDE FASTENER lieo'nard M. Dorman, Meadville, Pa., a'ssignor to Talon, Inc., a corporation of *Pennsylv'ariia Application March 7, 195:1,"senn No. 214,297

16 Claims. (CUE- 409) This invention relates to slide fasteners, andparticsulaily to an improved slider therefor and method of making the same.

It is one of the objects of thepresent invention 'to provide a novel method of attaching to the sliderbody a member which may serve as a means :for-connecting the =p1ill member to "thebody, or as means for locking the slider automatically along the fastener elements at any desiredpoint.

It is another object of the invention to .provide a method of making a slider consisting of a minimum muniber of .parts which can be easily and 'quiclily assembled with a minimum number of operations.

It is a [further object of this invention to ,provide a lock slider which is readily adaptable for manufacture "from nonmetallic material, such as a plastic, and which ismuchmore rugged and stronger thanplasticlock slider s made by otherknown methods.

It is still another object of the present invention to provide'such aslider wherein -theqpullm'emberhas a solid trunnion or pivotal portion thereby eliminating any danger of disengagement of the trunnion from=the slider body and, "at the same time, possesses all the normal .functiQns and advantages of agood automatic lock slider.

various other objects and advantages of thisinvention will .be more apparent in the course of the following specification, and will beparticularlypointed out in the appended claims.

'In the accompanying drawings, there is shown for the ,purpose of illustration, several embodiments which my invention may assume in. practice.

"In these drawings: Fig. 1 is a plan view of a slide fastener 'havingthe improved slider ofmy invent ion incorporated itherewith; Fig. 2 is a sectional view taken on line .22 of Fig. 1; Fig. 3 is a sectionalview taken on lin'e"3-3 of Fig. 2; Fig. 4.%is a sectional view taken on li ne 4-4-of Fig. 2;

and

5 is a side elevational view "of "ainodified form of islider in a'ocor-dance with the present-invention.

Referring more particularly to the d'rawings, there is :shown im-Fig. v1, aconventional type slide fastener com- :p-r ising alpairofstringertapes-Z having a se'ries-of'opposed spaced-apart interlocking fastener elements 3 arranged along the opp'ose'd beaded 'edg'es thereof. There is arranged on the fastener elements, 'a slider 4 con- 2,7643%? Patented Oct. 2, 1956 '2 slider body is made preferably of a moldable plastic material, such as nylon, but may be made from metal or any other suitable material.

According to the present invention, there is arranged on the outer side of the upper wing-5 centrally thereof, a pairof spaced-apart lugs 9 and 10. On either side of the lug 9, there is arranged an outwardly extending projection with each being preferably beveled, as at 1'3, at'the outer upper ends thereof, as shown in Fig. 3, for avpurposehereinafter to be described. Also, on the other or lower lug 10, there is arranged to either side thereof a similar outwardly extendingprojection14 both of whih also are preferably beveled, as at '15, at their outer upper ends, as shown in Fig. 4.

There is provided an elongated cap like member "'16 having' a top wall 1 7, end -walls 18 and'19, and side walls 20 andZl which are slightly yieldable for assembling .purposes as 'will be described. At the upper end of this cap like member, 'there is arranged in the side walls thereof, apair of opposed apertures 22 in which the op- .posed projections 12-carried by the lug '9' are disposed.

In the side wallsZt) and 21 at the lower end of the caplike member, there is likewise arranged a pair of opposed apertures 23 in which the opposedprojections 14 carried by the lug IO-are disposed. In case'the slider is to be used as alock slider, the lower apertures '23 are substantially larger than the ,projections "14, as shown in Figs. 2 and 4, so as to .permit movement o'f'thelower end of thecap-like member lo-relative to the slider body as willbedescr ibed. This cap-like member is also .prferably made of aplastic material, such as-nylon, but may be madejfrom any-other suitable material.

'There is arranged with the side wall 21 rif'the cap-like member 13, alocking projection 24 which normally extends -through an openingZS-id-the upper wing'5 ofthe slider body into the'channel therein and into engagement with'the fastener elements 3 to 'lock the slider in a wellknown manner.

like looking member to its locked position in a manner well known. 7

'There is provided a pull member 28 which may be of any convenient form and consists (preferably of a flat member having a large rectangular-shaped opening 29 at its one end so as to provide atpairo f spacedapart leg "portions 30 terminating in a solid pivotal or trunnion portion 31 atits extreme end 'by means of which the pull is ,pivo'tally attached to the slider as will be Ipresently explained. This trunnion orpivotal portion 31 is disposed loosely in the space between the lugs 9 and T0 withthe trunnion portion extending to either side of the lugs so as to be disposed in a relieved or cutaway ,portion 32 in the side walls of the cap-like member, as more clearly shown in Fig. 2 of'the drawings. This'trunnion portion 'is maintained in such position by the cap-like member is-waits a'ct-s asapull'attaching 'means as well as alock- 'Whn "the "pull member is manipulated to operate'the slider, the trunnion or pivotal portion 31 is forced against the bottom edges of the cutaway portion 32 of the side walls of the cap-like member, thereby moving it about its pivotal connection with the projection 12 of the lug 9 against the action of the spring 26 thereby moving the locking projection 24 out of the channel of the slider and out of engagement with the fastener elements therein so as to permit free movement of the slider therealong in a manner well known to those skilled in the art.

The slider of my invention is assembled in the following manner, As has been previously stated, the slider body is preferably molded from a suitable material with the lugs 9 and 19 and projections 12 and 14 integrally molded therewith. After such a slider body is provided, the spring member 26 is positioned in the opening in the end of the lug 9, and then the pivotal or trunnion portion 31 of the pull member 28 is disposed between the lugs 9 and 10. The cap-like member 16 is then positioned on the lugs 9 and lil and forced toward the slider body, as shown in Fig. 2. In forcing the cap-like member over the lugs, the side walls of the cap-like member will yield and spread sufliciently so as to permit the side walls to pass over the ends of the projections 12 and 14 due to the beveled upper ends 13 and 15 of the projections 12 and 14, respectively. When the cap-like member is fully seated on the lugs, the side walls of the caplike member will spring back to their normal positions and the projections 12 will be disposed in the apertures 22, and the projections 14 will be disposed in the apertures 23 so as to lock securely the cap-like member in position on the lugs 9 and 10 with the trunnion portion of the pull member disposed loosely between the caplike member and the upper wing of the slider body. In other words, the cap-like member is forced over the lugs and the outwardly projecting portions carried thereby and moved to position by a snapping action. This completes the assembly of the slider.

In Fig. of the drawings, there is shown a slight modification of the invention wherein a non-locking slider is shown. In this construction, the locking projection 24 and spring 26 have been eliminated and the lower apertures 33 in the side walls of the cap-like member are slightly smaller than the lower apertures 23 in the caplike member 16 of the lock slider construction as has been previously described so as to eliminate any movement between the cap and the slider body which, of course, is not necessary in this type of slider. Otherwise, this construction is the same as that shown for the lock slider and it is assembled in the same manner.

While I have shown and described several embodiments which my invention may assume in practice, it will be understood that these embodiments are merely for the purpose of illustration and description, and that other forms may be devised within the scope of my invention as defined in the appended claims.

What I claim as my invention is:

1. The method of making a slider for slide fasteners of the class described comprising the steps of forming a slider body having spaced-apart wing portions secured together at one end thereof so as to provide a channel therebetween, forming at least one lug on the outer surface of one of said wing portions having an outwardly extending projection arranged on either side thereof, providing a cap-like member having opposed apertures arranged in the side walls thereof, and positioning said cap-like member on said lug and forcing it to position thereon so that said projections are disposed in said apertures whereby said cap-like member is securely held in position thereon.

2. The method of making a slider for slide fasteners of the class described comprising the steps of forming a slider body having spaced-apart wing portions secured together at one end thereof so as to provide a channel therebetween, forming a pair of spaced-apart lugs on the outer surface of one of said wing portions with each having an outwardly extending projection arranged on either side thereof, providing a cap-like member having two pairs of opposed apertures arranged in the side walls thereof, and positioning said cap-like member on said lugs and forcing it to position thereon so that said projections are disposed in said apertures whereby said caplike member is securely held in position thereon.

3. The method of making a slider for slide fasteners of the class described comprising the steps defined in claim 2, and including forming a beveled surface on the outer ends of the outwardly extending projections on the lug so as to aid in guiding and positioning the projections into the apertures of the cap-like member.

4. The method of making a slider for slide fasteners of the class described comprising the steps defined in claim 2, and including forming a beveled surface on the lower inner edges of the side walls of the cap-like member opposite the apertures therein so as to aid in positioning and guiding the projection on the lugs in said apertures.

5. The method of making a slider for slide fasteners of the class described comprising the steps of forming a slider body having spaced-apart wing portions secured together at one end thereof so as to provide a channel therebetween, forming a pair of spaced-apart lugs on the outer surface of one of said wing portions with each having an outwardly extending projection arranged on either side thereof, providing a cap-like member having yieldable side walls in which there are arranged two pairs of opposed apertures with the pairs spaced apart a distance substantially equal to the distance between the projections on said lugs, the distance between said side walls being slightly greater than the width of said lugs, positioning said cap-like member on said lugs and forcing it toward the slider body over said lugs whereby the side walls of said cap-like member will yield slightly due to the camming action of said projections thereby permitting said side walls to pass over the ends of said projections with said projections adapted to be disposed finally in the respective apertures after said cap-like member has been moved to its innermost position on said lugs and the side walls have assumed their normal position.

6. The method of making a slider for slide fasteners of the class described, the steps as defined in claim 5, and including forming a beveled surface on the outer ends of the outwardly extending projections so as to aid in the camming action of the projections on the side walls of the cap-like member when it is being snapped to position on the lugs.

References Cited in the file of this patent UNITED STATES PATENTS 1,822,173 Prentice Sept. 8, 1931 1,935,727 Prentice Nov. 21, 1933 1,966,457 Norton July 17, 1934 2,227,766 Sico Jan. 7, 1941 2,261,302 Smith Nov. 4, 1941 2,280,968 Newhall Apr. 28, 1942 2,537,749 Gloss Jan. 9, 1951 FOREIGN PATENTS 893,358 Fr nce 1944 

